Duplex tamperproof sash lock



April 27, 1937.

J. JACOB DUPLEX TAMPERPROOF SASH LOCK Filed May 27, 1936 Fqy- 2Sheets-Sheet2 Patented Apr. 27, 1937 PATENT FFiE DUPLEX TAMPERPROOF SASHLOCK John Jacob, New York, N. Y.

Application May 27, 1936, Serial No. 82,105

2 Claims.

My invention relates to sash locks and it consists in the constructions,arrangements and combinations herein described and claimed.

It is an object of the invention to provide a dual sash lock in whichthe upper and lower sashes of double hung windows may be effectivelylocked in various adjusted positions.

It is also an object of the invention to provide a lock wherein eitherof the windows may be individually locked in an open position, yet beingof such nature that the lock may not be forcibly opened.

It is a still further object of the invention to provide a sash lockwhich may be readily incorporated upon old and new window structures ata minimum of cost.

Additional objects, advantages and features of invention will beapparent from the following description and accompanying drawings,wherein Figure 1 is a fragmentary perspective view of a window having mylock installed thereon.

Figure 2 is a fragmentary vertical sectional v1ew.

Figure 3 is a similar view taken at right angles to Figure 2.

Figure 4 is a horizontal cross sectional view.

Figure 5 is a perspective view of a combined mounting plate and boltactuator.

Figure 6 is a perspective view of the locking bolt.

There is illustrated generally, a window In including upper and lowersliding sashes II and I2.

Upon the lower sash l2 there is a plate I3, one end M of which is bentat right angles to snugly rest upon the upper face of the horizontalstile [5, while the end [B of the plate lies flush against the frontface of the vertical stile H. The portion M of the plate is suitablydrilled for fastening means, as will be presently described, and theportion l6 includes a staple l8 cooperable with a locking bolt,generally indicated at l9.

A mounting plate 20, of angular formation is provided, one leg 2| ofwhich is to be positioned upon the portion M, the other leg 22 abuttingthe portion [6. The leg 2| has apertures 23 adapted to register withapertures of the portion M for receiving mounting screws 24. The platesl3 and 20 are thus rigidly secured to the lower sash.

A guide plate 25 is rigidly connected with the leg 22, extending atright angles thereto, being of arcuate shape, in the body of which thereis formed a slot 26. The slot 26 extends longitudinally of the plate,but at an angle, the innermost point of the slot being quite close tothe leg 22, and extends at an angle outwardly therefrom.

The mounting plate 20, as may be seen from Figures 1 and 5, includes anintegrally connected sleeve 21, along one longitudinal edge of the leg2| the sleeve being of a length slightly less than the length of theleg.

The bolt l9 comprises locking pins 28 and 29, disposed at right anglesto each other and integrally connected with a rod 30. The pin 28 isreciprocable through the sleeve 21 and retractable by a helical spring3| interposed between the sleeve 21 and a Washer 32 positioned upon thepin 28 adjacent the juncture of the pin with the rod 38. The rod 30passes through the slot 26, and in operation the rod 30 will traversethe slot for the purpose of disengaging the pin 28 from the aperturedstrike plate 33 of the upper sash H.

The rod 30 is connected to the pin 29 intermediate its length, oneportion 34 thereof adapted to engage in an aperture 35 of a strike plate36 suitably mounted upon the frame of the window, the other portion 31swingably mounting a hasp 3B, cooperable with the staple [8.

With the device applied to a window, and it be desired to lower and lockthe upper sash II at a predetermined open position, assuming the partsto be in the position shown in Figure l, the hasp 38 is swung upwardlyso as to clear the staple l8, and the locking bolt I9 swung upwardly, asshown in dotted lines in Figure 2, the locking pin 28 serving as thepivot. During such movement it will be seen that the rod 20 will followthe slot 36 causing retraction of the bolt 28 from engagement with thestrike plate 33. In such position of the parts the upper sash may belowered to the point desired which must of course bring an aperture ofthe plate 33 into alinement with the pin 28. The bolt I9 is then swungback to the position shown in Figure l, causing movement of the pin 28into an aperture of the strike plate 33, against the action of thespring 3|, and the pin 34 will also be engaged in an aperture of thestrike plate 36. The hasp 38 is next moved into position over the staple[8. Any suitable padlock may of course be associated with the staple forpreventing unauthorized opening of the sash lock.

It will be understood of course that both of the sashes II and I2 may bemoved to a desired position of adjustment and then locked, the onlyrequirement in any event, is that the locking pins shall register withan aperture of respective strike plates.

The apertures of the strike plates may have any shape desired so as topermit engagement of the locking pins, and also the spacing of theapertures may vary according to particular needs.

The strike plates may be mounted in suitable channels 39 formed in theframe work, anchored by means of spaced lugs 40, suitably apertured toreceive screws 4|.

While I have shown and described a preferred form of my sash lock, thisis for the purpose of illustration only, and I consider as my own, allsuch modifications as fairly fall within the scope of the appendedclaims.

I claim:

1. A duplex sash lock comprising a mounting plate adapted to be mountedupon the upper stile of the lower sash of a window, said mounting plateincluding a sleeve, a locking pin revolubly and reciprocably mounted inthe sleeve and adapted to cooperate with the apertures of a strike plateon the upper sash, a rod integrally connected with the pin, said rodextending in a plane parallel with the vertical stile of the lower sash,and terminating in a right angularly disposed locking pin adapted tocooperate with an apertured strike plate mounted on the window frame,and camming means engageable with said tract the locking pin, a rodconnected with the pin and extended substantially at right anglesthereto and lying in a plane parallel to the vertical axis of the lowersash and terminating in a right angularly disposed arm, one end portionof the arm having a hasp thereon, the other end of the arm defining alocking pin adapted to cooperate with an apertured strike plate mountedon the frame of the window and cooperable with the last named lockingpin, a staple member carried by the lower sash member and cooperablewith the hasp, and an upwardly curved plate integrally connected withthe mounting plate, said plate having a slot inclined at an angle fromthe base of the plate toward its upper outer edge and receiving said rodtherethrough.

JOHN JACOB.

